A novel Integral-Proportional (I-P) speed controller in PMSM motor drive

This paper has proposed a novel (Integral-Proportional) I-P controller in speed control of a permanent magnet synchronous machine (PMSM) drive system, it removes the side effects such as slow dynamic response of the conventional I-P controller and maintains the advantages in the meantime. Theoretical studies for the conventional P-I, I-P and the proposed controllers in the s-domain and z-domain are presented, and the transfer functions of them are derived. The responses of the controllers to step input reference and sudden change in reference speed and load are analysed in simulation and experiment. Both the simulation and the experimental results show the effectiveness of the proposed controller.